Apparatus



F. L. HEDENBERG.

Hot Air Furnace.

Patented March30, 1858.

rr STATES PATENT onnron.

FRANCIS L. HEDENBERG, OF NEW YORK, N. Y.

HEATING APPARATUS.

Specification of Letters Patent No. 19,77 5, dated March 30, 1858. i

To all'whom it may concern:

Be it known that I, F. L. HEDENBERG, of the city, county, and State of New York, have invented certain new and useful Improvements in Heating Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part thereof, in which Figure 1 represents in perspective a central vertical section through the heater, and Fig. 2 represents a transverse section through so much of the heater as is shown in Fig. 1.

Similar letters where they occur in the separate figures denote like parts of the heater in both.

The nature of my invention consists in the manner of arranging within the case, the fire box; combustion, spark or draft chamber, and the gas and air pipes, so that they shall be surrounded by water space, as will be hereinafter explained; the object being, to regulate draft, and to economize fuel and space, and to make available all the heating surfaces possible.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A represents a case or shell, for inclosing the heating apparatus which may be of any of the ordinary shapes, or sizes used for similar purposes, and may be inclosed in brick work in any of the usual ways.

B, represents a fire chamber, with a grate 0, below it, and a door D, for supplying fuel theretothe frame E, of said door projecting from the case or shell to admit of the brickwork when used, and inclining upward to facilitate the introduction of the fuel.

F, is the ash box, or chamber, placed below the fire box, and also furnished with a door Gr, so as to have access thereto. Below the ash box, which has a sifter H, in its bottom part, is an air space I, also provided with a door or register for admitting draft to the furnace.

Above the fire box B, is placed a flue chamber J, of about the length of the fire box, which is also furnished with a suitable door K, for gaining access to said chamber, for the purpose of cleaning, repairs, or any other purpose; and from the rear end of this flue chamber, rises the exit pipe or flue L, for carrying off the smoke, gases, &c.

The fire chamber B, and flue chamber J, are united by a series of flue pipes M, which receive and convey the heat, and burning gases from said fire chamber, to said flue chamber, and thus distribute the heat more uniformly through the heating apparatus. The number of these flue pipes must be regulated to the size of the heater, and, as will be seen by the drawings, they convey the flame, heat, &c., out laterally into the heater, then rise vertically, and return back into the flue chamber J, which is common to the series; and from thence the heated products may escape by the exit flue L. It is obvious that, these flue pipes may have other forms or shapes than herein shown, and serve the same purpose, the object being to carry the heat and flame through the water space at many points instead of leading them in a direct course to the exit, by which means the heat is more regularly and uniformly applied to all parts of the water and air. The flue chamber being common to all the flues will also admit of uniform draft through them all; and these flues lead from both sides of the fire chamber into the said flue chamber, and may also, be arranged on the third or rear sides or ends of said chambers, if found essential to do so.

a, a, a, is water-space, surrounding the fire chamber, flues, and flue chamber, and indeed every portion of the heater that can impart heat to it, and for heating air by the heated water, any suitable number of air tubes or 'pipes N, may extend through the water space, through which pipes air can be admitted and allowed to pass, being heated in its transit, by said pipes, which are surrounded by the hot water in the water space. hen thus used, the air to be heated, should be introduced below the heating apparatus, and after it is heated by passing through the tubes, it may pass into a hot air chamber or receiver, and thence be conveyed to any desired point; or, it may be taken directly from the tubes.

Having thus fully described the nature of my invention, what I claim therein as new and desire to secure by Letters Patent is The arrangement within the case A, of the fire box B, spark, or draft chamber J, and the flue and air pipes M, N, the whole being surrounded by water space, and connected and arranged substantially in the manner, and for the purpose set forth.

FRANCIS L. HEDENBERG.

WVitnesses:

T. STUYVESANT, D. T. HEDENBERG. 

